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In 2015, the U.S. interactive ad revenue reached $59.6 billion in 2015, up 20% compared with 2014, according to the IAB/PwC Internet Advertising Revenue Report 2015 Full Year and Q4 2015 report
released Thursday.

The fourth quarter of 2015 reached 17.4 billion, up 23% compared with the year-ago quarter.

The full year report, prepared by PwC US, shows that fourth-quarter
numbers rose 23% to $17.4 billion, and 18% to $14.7 billion and compared with the third-quarter of 2015.

CPMs soared overall, digital video
continues to rise at more than 30%, revenue associated with impression-based advertising rose 21% and holds one-third share of the revenue.

Positive effects of improved measurement, viewable
inventory and combating fraud continues to become more noticeable in the revenue numbers, per IAB. It helps to produce rising CPMs and overall volume grow. Programmatic media buys also continue to
contribute to a new supply and demand relationship.

Overall, advertisers in retail continue to represent the largest category of internet ad spending, responsible for 22% in 2015, followed by
automotive and financial services which each accounted for 13% of the year’s revenue.